/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.urule.runtime.assertor;

import com.bstek.urule.Utils;
import com.bstek.urule.model.library.Datatype;
import com.bstek.urule.model.rule.Op;

import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Date;

/**
 * @author Jacky.gao
 * @since 2015年1月6日
 */
public class GreaterThenEqualsAssertor implements Assertor {

    public boolean eval(Object left, Object right, Datatype datatype) {
        if (left == null || right == null) {
            return false;
        }
        if (datatype.equals(Datatype.Date)) {
            Date leftDate = (Date) datatype.convert(left);
            Date rightDate = (Date) datatype.convert(right);
            Calendar leftCalendar = Calendar.getInstance();
            leftCalendar.setTime(leftDate);
            Calendar rightCalendar = Calendar.getInstance();
            rightCalendar.setTime(rightDate);
            int result = leftCalendar.compareTo(rightCalendar);
            if (result == 1 || result == 0) {
                return true;
            }
        } else {
            BigDecimal leftNumber = Utils.toBigDecimal(left);
            BigDecimal rightNumber = Utils.toBigDecimal(right);
            int result = leftNumber.compareTo(rightNumber);
            if (result == 1 || result == 0) {
                return true;
            }
        }
        return false;
    }

    public boolean support(Op op) {
        return op.equals(Op.GreaterThenEquals);
    }
}
